Question

48 of 36 (7 complete) Disk drives have been getting larger. Their capa ty is now often given in terabytes TB) where , TB-100 ggabrno about a trillion bytes. A survey of prices for axternal disk drives found the data shown to the right. For this dara, we wart to predict Price from Capacity. Complete parts a through h. 0.130 0210 0.460 2.0 38 99 71.00 215.45 a) Find the slope estimate, by 290.00 40 b(Round to two decimal places as needed) b) What does it mean, in this context? O A. It indicates the additional price in dolars for each additional TB of capacity. B. Itindicates the additional capacity in TB for each additional dlar of price O C. It indicates the price for a hard drive with no capacity. This could be interpreted as the cost of the parts common to all drive O D. It indicates the additional capacity in gigabytes for each additional dolar of price O E、 It is meaningless and should not be interpreted c) Find the intercept, b bo (Round to two decimal places as needed) d) What does it mean, in this context? Is it meaningful? O A. It indicatos the additional capacity in TB for each additional dollar of price it is meaningtu O B. It indicates the capacity for a hard drive that does Oc. It indicates the capacity for a hard drive that does not cost anythingnis meaningful n that it could be interpreted as the minum capaitytraianes O D. It indicates the price for a hard drive with no capacity. Itis meaninglul in that it could be interpreted as the cost of the parts common to all dfves not cost anything. It is meaningless and should not be interpreted lick to select your answer(s). Capacity (in TB) | Price (in s)_ 0.050 0.130 0.210 0.460 2.0 3.0 4.0 28.00 38.99 44.49 71.00 215.45 290.00 459.49 e) Write down the equation that predicts Price from Capacity. PriceCapacity Round to two decimal places as needed.) f What would you predict for the price of a 1.0 TB disk? (Round to the nearest cent as needed.) a) You have found an average 1.0 TB drive for $140. Is this a good buy? How much more or less would you pay compared to what you expected to pay? Is paying $140 for a 1.0 TB drive a good buy? O Yes O No How much more or less would you pay compared to what you expected to pay? You would pay $than what you expected to pay. Round to the neares h) Does the model o more underestimate the price? ed.) O A. It overestima less h) Does the model overestimate or underestimate the price? 0 A. It overestimates the price. O B. It underestimates the price. Click to select your answer(s).

Answer 1

XY XX 1.4 0.0025 784 0.13 38.99 5.0687 0.0169 1520.22 0.21 44.499.3429 0.0441 1979.36 71 32.66 0.21165041 4 46418.7 984100 16 211131 0.05 28 0.46 2 215.45 430.9 4 459.49 1837.96 X 9.85. 〉 Y-1147.42 290 870 Σ XY-3187 3316, Σ xx = 29.2751. Σ YY = 350974.3428

a)

7 *3187.3316-9.85 1147.42 7 29.2751-9.85 * 9.85 ~ 102.0288

b₁ = 102.0288

b)It indicates the additional price in dollars for each additional TB of capacity
c)

187.3316 ะ 20.348 1147.4229.2751- 9.853187.3316 7 29.2751-9.85 * 9.85 Cl

d)It indicates the price for a hard drive with no capacity. It is meaniing full in that it could be interpreted as the cost of the part common in all hard drives
e)
20.348 + 102.02882 y

f)

72,2 3751o 1-20.348 102.0288(1.0) У 122.3768